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Kinematic History of a Salient-recess Junction Explored through a Combined Approach of Field Data and Analog Sandbox Modeling
Published on: August 5, 2016
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JH-2 constitutive model of sandstone for dynamic problems
Paweł Baranowski1, Michał Kucewicz2, Jacek Janiszewski2
1Institute of Mechanics and Computational Engineering, Faculty of Mechanical Engineering, Military University of Technology, 2 Gen. S. Kaliskiego Street, 00-908, Warsaw, Poland. pawel.baranowski@wat.edu.pl.
Scientific Reports
|February 9, 2024
Summary
The Johnson-Holmquist II (JH-2) model effectively simulates sandstone behavior under dynamic loads, showing good agreement with experimental data. This study validates the JH-2 rock constitutive model for materials beyond its original scope, offering guidance for dynamic rock simulations.
Area of Science:
- Geotechnical Engineering
- Computational Mechanics
- Materials Science
Background:
- The Johnson-Holmquist II (JH-2) model is a widely used constitutive model for simulating material behavior under dynamic loading conditions.
- Accurate simulation of rock material behavior is crucial for various engineering applications, including underground construction, mining, and defense.
Purpose of the Study:
- To apply and validate the Johnson-Holmquist II (JH-2) constitutive model with correlated parameters for simulating sandstone behavior.
- To assess the model's performance across a range of dynamic and quasi-static loading scenarios.
- To evaluate the JH-2 model's applicability to materials for which it was not originally calibrated.
Main Methods:
- Simulation of sandstone behavior using the Johnson-Holmquist II (JH-2) model with validated parameters.
- Modeling of various tests: single-element, quasi-static uniaxial and triaxial compression, split Hopkinson pressure bar, drop-weight impact, small-scale blasting, and projectile impacts.
- Quantitative and qualitative comparison of simulation results with experimental and analytical data.
Main Results:
- The JH-2 model demonstrated good agreement with experimental and analytical results for sandstone under dynamic loading conditions.
- The model provided reasonable simulations for various dynamic tests, including impact and blasting scenarios.
- Limitations were identified for quasi-static problems, consistent with the model's high-strain-rate origins.
Conclusions:
- The Johnson-Holmquist II (JH-2) rock constitutive model is capable of producing reasonable results for sandstone, even when applied to materials beyond its original calibration.
- The study provides valuable insights and guidance for modeling and simulating the dynamic behavior of sandstone and other rock materials.
- The validated JH-2 model serves as a useful tool for predicting rock responses under diverse dynamic loading conditions.
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